Network Operating Systems
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Course Introduction
Network Operating Systems explores the design, implementation, and management of operating systems that support communication, resource sharing, and security across computer networks. This course covers key concepts such as distributed file systems, network protocols, remote procedure calls, authentication mechanisms, and synchronization across networked devices. Students will analyze different network operating system architectures, evaluate their performance, and develop practical skills in configuring, maintaining, and troubleshooting network-based operating environments commonly used in enterprise and cloud settings.
Recommended Textbook
Understanding Operating Systems 7th Edition by Ann McHoes
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16 Chapters
646 Verified Questions
646 Flashcards
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Chapter 1: Introducing Operating Systems
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Sample Questions
Q1) ____ is where the data and instructions of a computer must reside to be processed.
A) CPU
B) Main memory
C) Read-only memory
D) I/O memory
Answer: B
Q2) ____ means that several logical records are grouped within one physical record.
A) Grouping
B) Fixing
C) Combining
D) Blocking
Answer: D
Q3) In the 1980s,as a result of multiprocessing techniques,it became possible to execute two programs at the same time in parallel.
A)True
B)False
Answer: True
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Chapter 2: Memory Management: Simple Systems
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Sample Questions
Q1) In the fixed-partition memory management scheme,the table that the Memory Manager uses to keep track of jobs is composed of the ____.
A) partition size, memory address, and status
B) status, access, and memory address
C) partition size, status, and access
D) partition size, memory address, access, and status
Answer: D
Q2) The fixed partition scheme works well when ____.
A) all jobs are of similar size
B) jobs have different sizes
C) job sizes are not known in advance
D) all jobs are under 100K
Answer: A
Q3) In a dynamic partition system,a null entry in the busy list occurs when a memory block between two other busy memory blocks is returned to the free list.
A)True
B)False
Answer: True
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4
Chapter 3: Memory Management: Virtual Memory Systems
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Sample Questions
Q1) Paged memory allocation offers the advantage that it doesn't require the entire job to be stored in memory during its execution.
A)True
B)False
Answer: False
Q2) The term "____" means that during any phase of its execution,a program references only a small fraction of its pages.
A) dynamic paging
B) structured programming
C) locality of reference
D) working set
Answer: C
Q3) With demand paging,if there are no empty page frames available,to move in a new page,one of the current resident pages must be placed into main memory.
A)True
B)False
Answer: False
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Page 5
Chapter 4: Processor Management
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Sample Questions
Q1) When using priority scheduling,priorities are assigned to jobs by the owner of the job (the user).
A)True
B)False
Q2) First-come,first-served (FCFS)is a preemptive scheduling algorithm that handles jobs according to their arrival time.
A)True
B)False
Q3) As a process moves through the system,its status changes.Possible process statuses include FINISHED,HOLD,READY,RUNNING,and WAITING.
A)True
B)False
Q4) Some systems use a strategy known as ____ to increase the priority of jobs that have been in the system for an unusually long time in order to expedite their exit.
A) lagging
B) aging
C) bumping
D) accelerated priority
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Chapter 5: Process Management
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Sample Questions
Q1) According to the Banker's Algorithm,an unsafe state always leads to deadlock.
A)True
B)False
Q2) Fill in the missing step in the following deadlock situation.Two users from the local board of education are each running a program (P1 and P2),and both programs will eventually need two DVD drives to copy files from one disc to another.Only two DVD-R drives are available and they're allocated on an "as requested" basis.Soon the following sequence transpires:
1)P1 requests drive 1 and gets it.
2)____
3)P1 requests drive 2 but is blocked.
4)P2 requests drive 1 but is blocked.
A) P1 requests drive 2.
B) P2 requests drive 2 and gets it.
C) P2 requests drive 1 but is blocked.
D) P1 releases drive 1.
Q3) Starvation is the result of a policy that liberally allocates resources.
A)True
B)False
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Page 7
Chapter 6: Concurrent Processes
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Sample Questions
Q1) ____ semaphores are used in the solution to the readers and writers problem that does not involve starvation.
A) Zero
B) One
C) Two
D) Three
Q2) When using the WAIT and SIGNAL operations,____ sets the process's process control block to the blocked state and links it to the queue of processes waiting to enter this particular critical region.
A) TS
B) SIGNAL
C) WAIT
D) BLOCK
Q3) When multiprocessing takes place at the thread level,a high degree of synchronization is required to disassemble each process.
A)True
B)False
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Chapter 7: Device Management
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Sample Questions
Q1) Two of the most important measures of optical disc drive performance are sustained data-transfer rate and maximum access time.
A)True
B)False
Q2) ____ is a way to optimize search times on hard disk drives by ordering the requests once the read/write heads have been positioned.
A) Rotational ordering
B) SSTF
C) C-SCAN
D) LOOK and SCAN
Q3) RAID level ____ requires two different parity calculations.
A) 2
B) 3
C) 5
D) 6
Q4) There are many more sectors on an optical disc than on a magnetic disk of the same area.
A)True
B)False
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Chapter 8: File Management
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Sample Questions
Q1) The formula for computing the current byte address (CBA)for a direct access file with fixed record length is ____.
A) CBA = (RN - 1) * RL
B) CBA = RN * RL
C) CBA = RN / RL
D) CBA = (RN + 1) * RL
Q2) Each volume in a system has a volume descriptor followed by a ____ that lists the names and characteristics of every file contained in that volume.
A) file location
B) volume directory
C) subdirectory
D) master file directory
Q3) A relative filename is a name that is selected by the File Manager when the file is created.
A)True
B)False
Q4) A volume must contain a single file.
A)True
B)False
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Chapter 9: Network Organization Concepts
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Sample Questions
Q1) Ethernet is the most widely known CSMA/CD protocol.
A)True
B)False
Q2) ____ is an example of a circuit-switched network.
A) A telephone system
B) The Internet
C) The United States Postal Service
D) A local area network
Q3) In the OSI transport protocol model,Layer Seven,the ____ layer,provides the interface to users and is responsible for formatting user data before passing it to lower layers for transmission to a remote host.
A) physical
B) network
C) presentation
D) application
Q4) A common goal of all networked systems is to provide a convenient way to share resources while controlling users' access to them.
A)True
B)False
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Chapter 10: Management of Network Functions
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Sample Questions
Q1) One advantage of process-based DO/S is that the processes can be assembled to communicate and synchronize with each other to provide a distributed network of resources,with each process knowing the location of its distributed peers.
A)True
B)False
Q2) In an object-based DO/S,if the local device manager cannot satisfy a user's request,the request is sent to ____.
A) another device manager
B) a central controller
C) a waiting queue
D) the heap
Q3) Typically,a DO/S system's scheduling function has three parts: a ____,a priority function,and an arbitration rule.
A) request evaluator
B) scheduling request
C) decision mode
D) request queue
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12
Chapter 11: Security and Ethics
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Sample Questions
Q1) A virus is defined as a small program written to alter the way a computer operates,without the permission or knowledge of the user.
A)True
B)False
Q2) Any vulnerability at the operating system level opens the entire system to attack.
A)True
B)False
Q3) Two methods of active wiretapping are "between lines transmission" and "____."
A) Trojan horse
B) piggyback entry
C) browsing
D) trap doors
Q4) As an alternative to passwords,some systems have integrated use of a ____.
A) smart card
B) fingerprint scanner
C) biometric scanner
D) retina scanner
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Chapter 12: System Management
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Sample Questions
Q1) When networked devices,such as printers,plotters,or disk drives are required,the ____ has the responsibility of allocating and deallocating the required resources correctly.
A) Network Controller
B) Network Device Controller
C) Network Resource Director
D) Network Manager
Q2) An algorithm for a positive feedback loop should monitor the effect of new arrivals in two places: the Processor Manager's control of the CPU and the Device Manager's read and write operations.
A)True
B)False
Q3) A negative feedback loop mechanism monitors the system and,when it becomes too congested,signals the Job Scheduler to ____.
A) send the jobs to another processor
B) suspend processing
C) slow down process arrival rate
D) speed up process arrival rate
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14
Chapter 13: Unix Operating Systems
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Sample Questions
Q1) Demand paging requires more complicated hardware configurations than swapping in that it increases the system overhead and under heavy loads,might lead to thrashing.
A)True
B)False
Q2) In UNIX,swapping uses a round robin memory-management policy.
A)True
B)False
Q3) A ____ is several programs simultaneously processing the same I/O stream.
A) pipeline
B) pipe
C) filter
D) redirect
Q4) The UNIX process scheduling algorithm picks the process that will run in the shortest amount of time to be run first.
A)True
B)False
Q5) UNIX can be mastered by novice programmers in a matter of weeks.
A)True
B)False
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Chapter 14: Windows Operating Systems
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Sample Questions
Q1) When opening a file in Windows,the creation of ____ helps bridge the gap between the characteristics of physical devices and directory and file system structures by providing a memory-based representation of shareable physical resources.
A) resource objects
B) file objects
C) file pointers
D) reference pointers
Q2) The primary file handling concept in recent versions of Windows is the virtual file.
A)True
B)False
Q3) Which of the following Windows operating systems integrates cloud environments and distributed access?
A) Windows XP
B) Windows 7
C) Windows 8
D) Windows Server 2012
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Chapter 15: Linux Operating Systems
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Sample Questions
Q1) A page's middle directory contains a pointer to the actual page frame.
A)True
B)False
Q2) Virtual memory in Linux is managed using a multiple-level table hierarchy. A)True
B)False
Q3) When a process requests pages,Linux loads them into memory.When the kernel needs the memory space,the pages are released using a most recently used (MRU)algorithm.
A)True
B)False
Q4) A path name can be either one name or a list of names separated by dashes. A)True B)False
Q5) The secure log file contains lists of all attempts to log in to the system,including the date,time,and duration of each access attempt.
A)True B)False
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Chapter 16: Android Operating Systems
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Sample Questions
Q1) What is one of the goals of the Android system as stated on the Android Web site for developers?
A) Enchant Me
B) Enhance Me
C) Astound Me
D) Magnify Me
Q2) Each app must have one ____ file that holds essential information that the operating system must have before it can run an application.
A) app log
B) manifest
C) directory
D) process
Q3) Android divides screen sizes into five size categories.
A)True
B)False
Q4) Management of the power supply is a key consideration for any operating system running on a mobile device.Using Wi-Fi instead of telephony can save power.
A)True
B)False
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